A fault tolerance system is a kind of system which it can repair itself when a software or hardware error happens. As a
matter of fact, in a fault tolerant system if an error happens the system will be able to repair itself and continue its job
without any interruption. The main point in these system is reliability feature which is so important. There are many
solution that can increase reliability in these system. One of these solution is redundancy method. In this paper, we tried
to create a system which has a high reliability because of using redundancy method. We investigated this method in
special kind of vehicles named Hybrid Vehicle. We showed that we can improve this feature remarkably using this
method